The MRCOOL NV25-3834 No-Vac Line Set is a 25-foot, pre-charged refrigerant line set featuring 3/8-inch and 3/4-inch copper tubing for compatible HVAC systems. Designed for use with MRCOOL ductless mini-split and heat pump equipment, it connects the indoor and outdoor units to circulate refrigerant efficiently. Its factory pre-charged design eliminates the need for traditional vacuumin... https://www.partshnc.com/mrcool-25-ft-pre-charged-line-set-nv25-3834